131 I Sodium Iodide


4.6 out of 5 (34 Reviews)



Post Assessment Questions


Expiration Date

31 Dec 2023

Last Reviewed

1 Jan 2021

Estimated Time To Finish

60 Minutes

Stay up to date on the latest medical knowledge

Start This Activity
Need Help?  If you have a system or content concerns, please contact support@statpearls.com

Activity Description

Radioiodine-131 is a therapeutic agent used in the management and treatment of hyperthyroidism and thyroid carcinoma. This activity describes the indications, mechanism of action, and contraindications for radioiodine-131 as a treatment for Graves disease, toxic adenoma, toxic multinodular goiter, and differentiated thyroid carcinoma. This activity will highlight information pertinent to members of the interprofessional healthcare team in the use of radioiodine-131 therapy.

Activity Image

Target Audience

This activity has been designed to meet the educational needs of physicians.

Learning Objectives

At the conclusion of this activity, the learner will be better able to:

  • Identify the specific indications of 131-Iodine in the treatment of differentiated thyroid cancer and benign thyroid conditions.
  • Outline the adverse effects of 131-Iodine in the treatment of differentiated thyroid cancer and benign thyroid conditions.
  • Identify the absolute contraindications for 131-Iodine in the treatment of differentiated thyroid cancer and benign thyroid conditions.
  • Summarize the importance of collaboration and communication amongst the interprofessional team to improve outcomes for patients receiving I-131.

Author(s) / Contributors Disclosure of Conflicts of Interest

Each author, editor, faculty and planning committee member have completed a disclosure form indicating that neither they nor their spouse/partner has a financial interest/arrangement or affiliation that could be perceived as a real or apparent conflict of interest related to the content of this activity.

COMMERCIAL SUPPORT: This activity has received NO commercial support.

Continuing Education Accreditation Information

This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of the Quillen College of Medicine, East Tennessee State University, and StatPearls, LLC. The Quillen College of Medicine, East Tennessee State University is accredited by the ACCME to provide continuing medical education for physicians.

Quillen College of Medicine, East Tennessee State University designates this activity for a maximum of 1.00 AMA PRA Category 1 CreditsTM. Physicians should only claim credit commensurate with the extent of their participation in the activity.

This activity is reported to the following Maintenance of Certification (MOC) boards:
American Board of Anesthesiology
  • General Operative Anesthesia
American Board of Internal Medicine
  • Endocrinology, Diabetes, and Metabolism
  • Internal Medicine
  • Medical Oncology
American Board of Otolaryngology
  • Head & Neck
American Board of Pathology
  • Clinical Pathology
  • Endocrine
American Board of Pediatrics
  • Pediatric Hematology-Oncology
American Board of Surgery
  • Complex General Surgical Oncology

Cancellation Policy: Cancellations must be received in writing and a money-back guarantee is provided if not completely satisfied.

  • StatPearls and ETSU reserve the right to cancel any course due to unforeseen circumstances. StatPearls and ETSU will not be responsible for other expenses incurred by the participant in the unlikely event that the program is canceled.

Equal Opportunity

  • StatPearls and ETSU are Equal Opportunity / Affirmative Action / Equal Access Institutions. 

Medium or Media Used:

  • Computer Requirements:  Internet Access
  • E-mail Address

Instructions for Credit

  1. Register for the activity and create a StatPearls login.     
  2. Review the required accreditation information:  Target audience, learning objectives, and disclosure information.
  3. Complete the entire self-study activity.
  4. Complete the post-test assessments.
  5. Successfully pass the post-test with a minimum score of 100%.
  6. Complete the evaluation survey. 
  7. Obtain a certificate.

StatPearls and ETSU adhere to ACCME Standards regarding commercial support of continuing medical education. It is the policy of StatPearls and ETSU that the faculty and planning committee disclose real or apparent conflicts of interest relating to the topics of this educational activity, that relevant conflict(s) of interest are resolved, and also that authors and editors will disclose any unlabeled/unapproved use of drug(s) or device(s) during their presentation. Detailed disclosure will be made prior to starting the activity.

The information provided at this CME/CE activity is for continuing education purposes only and is not meant to substitute for the independent medical/clinical judgment of a healthcare provider relative to diagnostic and treatment options of a specific patient’s medical condition.

  • If you need help with the system or have a question about content, please contact support@statpearls.com
  • If you have a question about the ETSU CME providership, please contact wolfes1@etsu.edu.


Media Usage Rights

The contributors and editors of StatPearls have attested that all associated media (images and video) have been legally cleared for use with this activity.  All copyrights are reserved.


    Venkatraman R. on 10/13/2020

    Deborah Z. on 1/3/2021

    good review

    NASAR S. on 3/2/2021

    Jim P. on 3/21/2021

    Coleen G. on 12/3/2021

    Michelle W. on 8/19/2021

    thomas on 8/30/2021

    Kelli H. on 9/13/2021

    Casey B. on 9/15/2021

    DIMITRIOS T. on 10/9/2021

    Mark C. on 10/19/2021

    Laura r. on 10/25/2021

    Gibi G. on 10/31/2021


    Mani Kiran Reddy Y. on 12/7/2021

    quang l. on 12/11/2021

    SANDRA R. on 12/27/2021

    Terri C. on 1/1/2022


    Brian G. on 2/13/2022

    Rodabeh M. on 2/14/2022

    john b. on 2/28/2022

    Michael Y. on 3/4/2022

    Sherrika W. on 3/6/2022

    Poornima V. on 4/13/2022

    Murari G. on 4/15/2022

    Jim P. on 4/24/2022

    ALI O. on 4/26/2022

    Stephanie C. on 4/27/2022

    Dr.Mallikarjun K. on 5/5/2022

    Ejaz J. on 5/18/2022

    Michelle A. on 6/2/2022

    Ana W. on 6/6/2022

    Mitzi W. on 6/10/2022

    Shannon j. on 6/26/2022

    Mary Y. on 8/5/2022

    Unlimited Physician CME

    Stay up to date on the latest medical knowledge with 6535 CME activities. In these online self-assessment activities, read our reference articles and test your knowledge with more than 7254 hours of CME.

    Learn About Lifetime CME

    Single Activity

    Take this single activity

    $39 1 activity

    6 Month Unlimited Physician CME

    Access to all the Unlimited Physician CME activities in all specialties.

    $249 per half year per user

    1 Year Unlimited Physician CME

    Access to all the Unlimited Physician CME activities in all specialties.

    $349 per 1 year per user